android 功能模块之通讯模块

缺乏、安全感 2023-10-16 19:26 10阅读 0赞

**Android通讯录开发之实现全选、反选功能**

2014年1月15日

实现全选、反选不是什么难的事情，就只是用另外一个数据结构来存储被选中的状态，通过刷新列表来更新列表的显示状态。下面是实现效果：

![20140115092735828][]

**定义一个散列表来存储选中状态**

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1.  // 用于保存勾选的联系人
2.  private HashMap<Contact, Boolean> map\_NumberSelected = new HashMap<Contact, Boolean>();

// 用于保存勾选的联系人
    	private HashMap<Contact, Boolean> map_NumberSelected = new HashMap<Contact, Boolean>();

**定义标识表示是否已经全选**

1.  private boolean isAllChecked = false;

private boolean isAllChecked = false;

**在触发事件的位置根据标识来实现全选或反选**

1.  if (isAllChecked) \{
2.  selectAllBtn.setBackgroundResource(R.drawable.select\_all\_not);
3.  invertSelection();
4.  \} else \{
5.  selectAllBtn.setBackgroundResource(R.drawable.select\_all);
6.  selectAllContacts();
7.  \}

if (isAllChecked) {
    				selectAllBtn.setBackgroundResource(R.drawable.select_all_not);
    				invertSelection();
    			} else {
    				selectAllBtn.setBackgroundResource(R.drawable.select_all);
    				selectAllContacts();
    			}

**全选方法**

1.  public void selectAllContacts() \{
2.  for (int i = 0; i < contactList.size(); i++) \{
3.  Contact contact = contactList.get(i);
4.  map\_NumberSelected.put(contact, true);
5.  \}
6.  isAllChecked = true;
7.  refreshList();
8.  \}

public void selectAllContacts() {
    		for (int i = 0; i < contactList.size(); i++) {
    			Contact contact = contactList.get(i);
    			map_NumberSelected.put(contact, true);
    		}
    		isAllChecked = true;
    		refreshList();
    	}

**反选方法**

1.  public void invertSelection() \{
2.  for (int i = 0; i < contactList.size(); i++) \{
3.  Contact contact = contactList.get(i);
4.  map\_NumberSelected.put(contact, false);
5.  \}
6.  isAllChecked = false;
7.  refreshList();
8.  \}

public void invertSelection() {
    		for (int i = 0; i < contactList.size(); i++) {
    			Contact contact = contactList.get(i);
    			map_NumberSelected.put(contact, false);
    		}
    		isAllChecked = false;
    		refreshList();
    	}

上面用到contactList是你得到的数据源，是一个List<Contact>，它跟map\_NumberSelected都通过adapter里面定义的set方法注入到adapter里，所以选中状态发生变化也相当于数据源发生变化，只要调用notifyDataSetChanged()方法就可以更新列表。

下面是自定义adapter的代码，更新选中的状态在getView方法进行

1.  package com.suntek.mobilemeeting.adapter;
2.  
3.  import java.util.ArrayList;
4.  import java.util.HashMap;
5.  
6.  import android.content.Context;
7.  import android.text.TextUtils;
8.  import android.view.LayoutInflater;
9.  import android.view.View;
10. import android.view.ViewGroup;
11. import android.widget.BaseAdapter;
12. import android.widget.CheckBox;
13. import android.widget.TextView;
14. 
15. import com.suntek.mobilemeeting.R;
16. import com.suntek.mobilemeeting.model.Contact;
17. 
18. /\*\*
19.  \* 本地联系人适配器
20.  \* 
21.  \* @author wwj
22.  \* 
23.  \*/
24. public class LocalContactAdapter extends BaseAdapter \{
25. 
26. private HashMap<Integer, View> lmap = new HashMap<Integer, View>();
27. private ArrayList<Contact> contactList;
28. private Context context;
29. private HashMap<Contact, Boolean> map\_NumberSelected = null;
30. private String kind;
31. 
32. public class ViewHolder \{
33. public TextView contactName;
34. public TextView contactMobile;
35. public TextView contactEmail;
36. public CheckBox checkBox;
37. \}
38. 
39. public LocalContactAdapter(Context context, ArrayList<Contact> contactList,
40. String kind) \{
41. this.contactList = contactList;
42. this.context = context;
43. map\_NumberSelected = new HashMap<Contact, Boolean>();
44. this.kind = kind;
45. \}
46. 
47. @Override
48. public int getCount() \{
49. return contactList.size();
50. \}
51. 
52. @Override
53. public Object getItem(int position) \{
54. return contactList.get(position);
55. \}
56. 
57. @Override
58. public long getItemId(int position) \{
59. return position;
60. \}
61. 
62. @Override
63. public View getView(int position, View convertView, ViewGroup parent) \{
64. ViewHolder holder;
65. if (convertView == null) \{
66. 
67. holder = new ViewHolder();
68. LayoutInflater inflater = (LayoutInflater) context
69. .getSystemService(Context.LAYOUT\_INFLATER\_SERVICE);
70. convertView = inflater.inflate(R.layout.local\_contact\_list\_item,
71. null);
72. holder.contactName = (TextView) convertView
73. .findViewById(R.id.name\_tv);
74. holder.contactMobile = (TextView) convertView
75. .findViewById(R.id.number\_tv);
76. holder.contactEmail = (TextView) convertView
77. .findViewById(R.id.email\_tv);
78. holder.checkBox = (CheckBox) convertView
79. .findViewById(R.id.local\_contact\_checkbox);
80. // lmap.put(position, convertView);
81. convertView.setTag(holder);
82. \} else \{
83. // convertView = lmap.get(position);
84. holder = (ViewHolder) convertView.getTag();
85. \}
86. 
87. Contact contact = contactList.get(position);
88. if (contact.getName() == "" || contact.getName() == null) \{
89. String name = "未知";
90. holder.contactName.setText(name);
91. \} else \{
92. holder.contactName.setText(contact.getName());
93. \}
94. 
95. if (kind != null && kind.equals("email")) \{
96. if (!TextUtils.isEmpty(contact.getEmail())) \{
97. holder.contactEmail.setText(contact.getEmail());
98. holder.contactMobile.setVisibility(View.GONE);
99. \}
100. \} else if (!TextUtils.isEmpty(contact.getNumber())) \{
101. holder.contactMobile.setText(contact.getNumber());
102. holder.contactEmail.setVisibility(View.GONE);
103. \} else \{
104. holder.contactMobile.setVisibility(View.GONE);
105. holder.contactEmail.setVisibility(View.GONE);
106. \}
107. // 显示是否选中状态
108. holder.checkBox.setChecked(map\_NumberSelected.get(contact));
109. 
110. return convertView;
111. \}
112. 
113. public void setContactList(ArrayList<Contact> contactList) \{
114. this.contactList = contactList;
115. \}
116. 
117. public void setMap\_NumberSelected(
118. HashMap<Contact, Boolean> map\_NumberSelected) \{
119. this.map\_NumberSelected = map\_NumberSelected;
120. \}
121. 
122. \}

package com.suntek.mobilemeeting.adapter;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    
    import android.content.Context;
    import android.text.TextUtils;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.BaseAdapter;
    import android.widget.CheckBox;
    import android.widget.TextView;
    
    import com.suntek.mobilemeeting.R;
    import com.suntek.mobilemeeting.model.Contact;
    
    /**
     * 本地联系人适配器
     * 
     * @author wwj
     * 
     */
    public class LocalContactAdapter extends BaseAdapter {
    
    	private HashMap<Integer, View> lmap = new HashMap<Integer, View>();
    	private ArrayList<Contact> contactList;
    	private Context context;
    	private HashMap<Contact, Boolean> map_NumberSelected = null;
    	private String kind;
    
    	public class ViewHolder {
    		public TextView contactName;
    		public TextView contactMobile;
    		public TextView contactEmail;
    		public CheckBox checkBox;
    	}
    
    	public LocalContactAdapter(Context context, ArrayList<Contact> contactList,
    			String kind) {
    		this.contactList = contactList;
    		this.context = context;
    		map_NumberSelected = new HashMap<Contact, Boolean>();
    		this.kind = kind;
    	}
    
    	@Override
    	public int getCount() {
    		return contactList.size();
    	}
    
    	@Override
    	public Object getItem(int position) {
    		return contactList.get(position);
    	}
    
    	@Override
    	public long getItemId(int position) {
    		return position;
    	}
    
    	@Override
    	public View getView(int position, View convertView, ViewGroup parent) {
    		ViewHolder holder;
    		if (convertView == null) {
    
    			holder = new ViewHolder();
    			LayoutInflater inflater = (LayoutInflater) context
    					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    			convertView = inflater.inflate(R.layout.local_contact_list_item,
    					null);
    			holder.contactName = (TextView) convertView
    					.findViewById(R.id.name_tv);
    			holder.contactMobile = (TextView) convertView
    					.findViewById(R.id.number_tv);
    			holder.contactEmail = (TextView) convertView
    					.findViewById(R.id.email_tv);
    			holder.checkBox = (CheckBox) convertView
    					.findViewById(R.id.local_contact_checkbox);
    			// lmap.put(position, convertView);
    			convertView.setTag(holder);
    		} else {
    			// convertView = lmap.get(position);
    			holder = (ViewHolder) convertView.getTag();
    		}
    
    		Contact contact = contactList.get(position);
    		if (contact.getName() == "" || contact.getName() == null) {
    			String name = "未知";
    			holder.contactName.setText(name);
    		} else {
    			holder.contactName.setText(contact.getName());
    		}
    
    		if (kind != null && kind.equals("email")) {
    			if (!TextUtils.isEmpty(contact.getEmail())) {
    				holder.contactEmail.setText(contact.getEmail());
    				holder.contactMobile.setVisibility(View.GONE);
    			}
    		} else if (!TextUtils.isEmpty(contact.getNumber())) {
    			holder.contactMobile.setText(contact.getNumber());
    			holder.contactEmail.setVisibility(View.GONE);
    		} else {
    			holder.contactMobile.setVisibility(View.GONE);
    			holder.contactEmail.setVisibility(View.GONE);
    		}
    		// 显示是否选中状态
    		holder.checkBox.setChecked(map_NumberSelected.get(contact));
    
    		return convertView;
    	}
    
    	public void setContactList(ArrayList<Contact> contactList) {
    		this.contactList = contactList;
    	}
    
    	public void setMap_NumberSelected(
    			HashMap<Contact, Boolean> map_NumberSelected) {
    		this.map_NumberSelected = map_NumberSelected;
    	}
    
    }

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